Intrusion alarm



FIG. 1 is a front elevational view of the intrusion alarm;

FIG. 2 is a right side view of the intrusion alarm;

FIG. 3 is a left side view of the intrusion alarm;

FIG. 4 is a top view of the intrusion alarm;

FIG. 5 is a rear view of the intrusion alarm; and

FIG. 6 is a bottom view of the intrusion alarm. 

The ornamental design for an intrusion alarm, as shown. 